Graphite lined stamp
A graphite lined stamp is a postage stamp on which vertical lines of electro-conductive graphite are printed on the reverse. Graphite lined stamps were used in the United Kingdom from 1957 to 1960 as an experiment in the automation of mail sorting.
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Graphite lined stamp
A graphite lined stamp is a postage stamp on which vertical lines of electro-conductive graphite are printed on the reverse. Graphite lined stamps were used in the United Kingdom from 1957 to 1960 as an experiment in the automation of mail sorting.
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A graphite lined stamp is a po ...... he automation of mail sorting.
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A graphite lined stamp is a po ...... he automation of mail sorting.
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Graphite lined stamp
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